Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantas figuras são fornecidas para a % de McCain no condado de Davidson?
 ###Tabelas: CREATE TABLE members_of_the_georgia_state_house_of_representatives_2007-2008 (members_of_the_georgia_state_house_of_representatives_2007-2008_id AUTO_INCREMENT PRIMARY KEY, District INT, Representative VARCHAR, Party VARCHAR, First elected INT, Residence VARCHAR) CREATE TABLE most_career_games (most_career_games_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Games INT, Player VARCHAR, Club/Clubs VARCHAR, Career span VARCHAR) CREATE TABLE by_county (by_county_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Obama# INT, Obama% VARCHAR, McCain# INT, McCain% VARCHAR) CREATE TABLE results_by_year (results_by_year_id AUTO_INCREMENT PRIMARY KEY, Year INT, Men's Open VARCHAR, Women's Open VARCHAR, Mixed Open VARCHAR, Men's u20 VARCHAR, Women's u20 VARCHAR, Senior Mixed VARCHAR, Men's 30 VARCHAR, Women's 30 VARCHAR, Men's 35 VARCHAR, Women's 35 VARCHAR, Men's 40 VARCHAR, Women's 40 VARCHAR, Men's 45 VARCHAR, Men's 50 VARCHAR) CREATE TABLE domestic_goals_summary (domestic_goals_summary_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Season VARCHAR, Playing for VARCHAR, Opponent VARCHAR, Final score VARCHAR)  
SELECT COUNT McCain% FROM by_county WHERE County = DAVIDSON